body {
    margin: 0;
}
h1,
h2,
h3,
h4,
h5,
h6,
ul,ol,p {
    padding: 0;
    margin: 0;
    
}
ul,ol {
    list-style: none;
}
a,
a:focus {
    text-decoration: none;
    color: #000;
    /* 移除移动端a标签点击高亮 */
    -webkit-tap-highlight-color: transparent;
}
input , textarea {
    outline: none;
    border: 1px solid #ccc;
    box-sizing: border-box;
}
button {
    border: 1px solid #ccc;  
}


.f_left {
    float: left;
}
.f_right {
    float: right;
}
.clearfix::after {
    content: "";
    display: block;
    clear: both;
}
